Paradyne 3821PLUS manual DS=n ± Dial Stored Number, En ± Command Character Echo, ± Identity

COMSPHERE 3821Plus Modem

Table 4-1

(2 of 13)

3821Plus AT Commands

Dn, continued

R ± Reverse Dial mode. Causes the originating modem to send out an answertone once it no longer detects ringback. (Ringback is the ring you hear at the originating site when making a call.) The R parameter must be the last character in the dial string. For correct operation, at least one ringback must be detected; therefore, the remote modem should be configured to answer on the second ring or subsequent rings.

@± Quiet answer. Wait for five seconds of silence after dialing the number. If the silence is not detected, the modem sends a NO ANSWER result to the DTE.

!± Hook flash. This causes the modem to go on-hook for 0.5 seconds, then return to off-hook.

;± Return to Command mode. Modem returns to Command mode after dialing a number without disconnecting the call. This is useful when the number exceeds 40 characters, or when the wait time between parts of a dial string is unknown.

Space, ± , and ( ). These characters are ignored by the dial string and can be included in the dial string to enhance readability.

DS=n ± Dial Stored Number

Dials the number stored in Location n (1±10). (To store a telephone number, refer to the &Zn=x command.)

En ± Command Character Echo

Controls whether or not characters are echoed back to the DTE when the modem is in Command mode.

E, E0 Disables echo to the DTE.

E1 Enables echo to the DTE.

Hn ± Hook Switch Control

Allows the modem to go off-hook or on-hook.

H, H0 Modem goes on-hook.

H1 Modem goes off-hook.

In ± Identity

Provides useful information when upgrading or servicing the product.

I, I0	Displays product code (default is 144).
I1	Displays 3-digit firmware revision number.
I2	Performs an EPROM check.
I3	Displays serial number.
I4	Displays model number.
I5	Displays hardware part number.
I6	Displays software part number.
I7	Displays the country code.
I9	Displays 3-digit firmware revision number (same as I1).
I10	Allows you to change the value displayed by I0:
	I10=0 causes I0 to display 144 (default).
	I10=1 causes I0 to display 240.
	I10=2 causes I0 to display 480.
	I10=3 causes I0 to display 960.
	I10=4 causes I0 to display 120.
I11	Displays the program memory checksum.
I17	Displays the last eight critical errors; the first is the most recent. (Service personnel use only.)
I19	Displays the entire firmware revision number.

O ± Return to Online or Data Mode

Returns modem to Data mode from Online Command mode.

4-4 January 1999 3821-A2-GB20-40